SOLUTION: Linnette can wax a floor in 25 minutes. One day her friend Shanika helped her and it only took 12 minutes. How long would it take Shanika to do it alone?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Linnette can wax a floor in 25 minutes. One day her friend Shanika helped her and it only took 12 minutes. How long would it take Shanika to do it alone?      Log On


   

Question 1177614: Linnette can wax a floor in 25 minutes. One day her friend Shanika helped her and it only took 12 minutes. How long would it take Shanika to do it alone?
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
.

Shanika's rate of work is  1%2F12+-+1%2F25 = 25%2F300+-+12%2F300 = 13%2F300  of the job per minute.


Hence, Shanika needs  300%2F13 = 23 1%2F13  minutes to complete the job.

Solved.

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It is a standard and typical joint work problem.

There is a wide variety of similar solved joint-work problems with detailed explanations in this site.  See the lessons
    - Using Fractions to solve word problems on joint work
    - Solving more complicated word problems on joint work
    - Selected joint-work word problems from the archive


Read them and get be trained in solving joint-work problems.

Also,  you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic
"Rate of work and joint work problems"  of the section  "Word problems".


Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.